RFR: 8366905: Store AdapterBlob pointer in AdapterHandlerEntry [v3]

[Andrew Dinn]

On Fri, 19 Sep 2025 21:45:16 GMT, Ashutosh Mehra <asmehra at openjdk.org> wrote:

>> This PR removes the need to store entry point addresses in AdapterHandlerEntry by storing a direct pointer to AdapterBlob instead. Entry point addresses can be computed on the fly from the entry point offsets stored in AdapterBlob.
>
> Ashutosh Mehra has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add missing ResourceMark
>   
>   Signed-off-by: Ashutosh Mehra <asmehra at redhat.com>

src/hotspot/share/runtime/sharedRuntime.hpp line 736:

> 734:   }
> 735: 
> 736:   address get_i2c_entry()                  const { return _adapter_blob != nullptr ? _adapter_blob->i2c_entry() : nullptr; }

Should these getters assert `_adapter_blob != nullptr`?
I think we should only ever have an AdapterHandlerEntry with a null blob on ZERO and in that case an attempt to use the entry would be invalid.

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/27101#discussion_r2367566558